<template>
  <div class="header">
    <van-icon name="arrow-left" class="icon" @click="toBack" />
    <div>{{ title }}</div>
    <div class="edit" v-if="edit" @click="editClickEvt">
      {{ store.state.edit ? '编辑' : '完成' }}
    </div>
  </div>
</template>

<script>
import emitter from '@/common/js/eventbus'

import { Toast } from 'vant'
import { useStore } from 'vuex'
import { useRouter } from 'vue-router'
export default {
  props: ['title', 'edit'],

  setup() {
    const router = useRouter()
    const store = useStore()
    const toBack = () => {
      router.go(-1)
    }

    const editClickEvt = () => {
      if (store.state.cartList.length) {
        emitter.emit('edit')
        store.commit('EDIT')
      } else {
        Toast.fail('购物车空空如也')
      }
    }

    return {
      toBack,
      editClickEvt,
      store,
    }
  },
}
</script>

<style lang="less" scoped>
.header {
  background-color: #fff;
  height: 40px;
  font-size: 20px;
  display: flex;
  justify-content: center;
  align-items: center;
  border-bottom: 1px solid #d7d7d7;
  position: relative;

  .edit {
    font-size: 16px;
    position: absolute;
    right: 15px;
    font-weight: normal;
  }

  .icon {
    position: absolute;
    left: 10px;
  }
}
</style>
